/* ============================================
   Email Validation Tool - Main Stylesheet
   ============================================ */

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary-color: #2563eb;
    --secondary-color: #64748b;
    --success-color: #10b981;
    --warning-color: #f59e0b;
    --danger-color: #ef4444;
    --light-bg: #f8fafc;
    --border-color: #e2e8f0;
    --text-color: #1e293b;
    --text-light: #64748b;
}

html, body {
    height: 100%;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background-color: #f1f5f9;
    color: var(--text-color);
    line-height: 1.6;
}

/* ============================================
   Typography & Utilities
   ============================================ */

a {
    color: var(--primary-color);
    text-decoration: none;
}

a:hover {
    text-decoration: underline;
}

h1, h2, h3, h4, h5, h6 {
    color: var(--text-color);
    margin-bottom: 0.5rem;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* ============================================
   Alerts
   ============================================ */

.alert {
    padding: 12px 16px;
    border-radius: 6px;
    margin-bottom: 1rem;
}

.alert-success {
    background-color: #d1fae5;
    color: #065f46;
    border-left: 4px solid var(--success-color);
}

.alert-danger {
    background-color: #fee2e2;
    color: #991b1b;
    border-left: 4px solid var(--danger-color);
}

.alert-warning {
    background-color: #fef3c7;
    color: #92400e;
    border-left: 4px solid var(--warning-color);
}

/* ============================================
   Forms
   ============================================ */

.form-group {
    margin-bottom: 1.5rem;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
}

label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
    color: var(--text-color);
}

.form-control, select {
    width: 100%;
    padding: 10px 12px;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    font-size: 14px;
    transition: border-color 0.3s;
}

.form-control:focus, select:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.form-control::placeholder {
    color: var(--text-light);
}

/* ============================================
   Buttons
   ============================================ */

.btn {
    padding: 10px 16px;
    border: none;
    border-radius: 6px;
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s;
    display: inline-flex;
    align-items: center;
    gap: 8px;
}

.btn-primary {
    background-color: var(--primary-color);
    color: white;
}

.btn-primary:hover {
    background-color: #1d4ed8;
}

.btn-secondary {
    background-color: var(--secondary-color);
    color: white;
}

.btn-secondary:hover {
    background-color: #475569;
}

.btn-success {
    background-color: var(--success-color);
    color: white;
}

.btn-success:hover {
    background-color: #059669;
}

.btn-danger {
    background-color: var(--danger-color);
    color: white;
}

.btn-danger:hover {
    background-color: #dc2626;
}

.btn-block {
    width: 100%;
    justify-content: center;
}

.btn-sm {
    padding: 6px 12px;
    font-size: 12px;
}

/* ============================================
   Authentication Pages
   ============================================ */

.auth-page {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    background: linear-gradient(135deg, var(--primary-color) 0%, #1e40af 100%);
}

.auth-card {
    background: white;
    border-radius: 12px;
    box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
    padding: 40px;
    width: 100%;
    max-width: 400px;
}

.auth-header {
    text-align: center;
    margin-bottom: 30px;
}

.auth-header h1 {
    font-size: 24px;
    margin-bottom: 8px;
}

.auth-header p {
    color: var(--text-light);
}

.auth-form {
    margin-bottom: 20px;
}

.auth-footer {
    text-align: center;
    padding-top: 20px;
    border-top: 1px solid var(--border-color);
    color: var(--text-light);
}

.auth-footer a {
    font-weight: 500;
}

/* ============================================
   Navigation & Header
   ============================================ */

.navbar {
    background-color: white;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
    padding: 16px 0;
    margin-bottom: 30px;
}

.navbar-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.navbar-brand {
    font-size: 18px;
    font-weight: 600;
    color: var(--primary-color);
}

.navbar-menu {
    display: flex;
    gap: 30px;
    list-style: none;
}

.navbar-menu a {
    color: var(--text-color);
    font-weight: 500;
    transition: color 0.3s;
}

.navbar-menu a:hover,
.navbar-menu a.active {
    color: var(--primary-color);
}

.navbar-user {
    display: flex;
    align-items: center;
    gap: 20px;
}

.navbar-logout {
    background-color: var(--danger-color);
    color: white;
    padding: 8px 16px;
    border-radius: 6px;
    font-size: 12px;
    cursor: pointer;
    border: none;
}

/* ============================================
   Tabs
   ============================================ */

.tabs {
    display: flex;
    gap: 0;
    border-bottom: 2px solid var(--border-color);
    margin-bottom: 30px;
}

.tab-button {
    padding: 12px 24px;
    border: none;
    background: none;
    cursor: pointer;
    font-size: 14px;
    font-weight: 500;
    color: var(--text-light);
    position: relative;
    transition: color 0.3s;
    display: inline-block;
    text-decoration: none;
}

.tab-button:hover {
    color: var(--text-color);
    text-decoration: none;
}

.tab-button.active {
    color: var(--primary-color);
}

.tab-button.active::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    right: 0;
    height: 2px;
    background-color: var(--primary-color);
}

.tab-content {
    display: none;
}

.tab-content.active {
    display: block;
}

/* ============================================
   Tables
   ============================================ */

.table-container {
    background: white;
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
}

table {
    width: 100%;
    border-collapse: collapse;
}

thead {
    background-color: var(--light-bg);
    border-bottom: 1px solid var(--border-color);
}

th {
    padding: 12px;
    text-align: left;
    font-weight: 600;
    color: var(--text-color);
    font-size: 12px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

td {
    padding: 12px;
    border-bottom: 1px solid var(--border-color);
    font-size: 13px;
}

tbody tr:hover {
    background-color: var(--light-bg);
}

.action-buttons {
    display: flex;
    gap: 8px;
}

/* ============================================
   Cards & Sections
   ============================================ */

.card {
    background: white;
    border-radius: 8px;
    padding: 24px;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
    margin-bottom: 24px;
}

.card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
    padding-bottom: 16px;
    border-bottom: 1px solid var(--border-color);
}

.card-header h2 {
    margin: 0;
}

/* ============================================
   Dashboard & Stats
   ============================================ */

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 20px;
    margin-bottom: 30px;
}

.stat-card {
    background: white;
    border-radius: 8px;
    padding: 20px;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
}

.stat-label {
    color: var(--text-light);
    font-size: 12px;
    text-transform: uppercase;
    margin-bottom: 8px;
}

.stat-value {
    font-size: 28px;
    font-weight: 700;
    color: var(--text-color);
}

/* ============================================
   Progress Bar
   ============================================ */

.progress {
    height: 8px;
    background-color: var(--border-color);
    border-radius: 4px;
    overflow: hidden;
}

.progress-bar {
    height: 100%;
    background-color: var(--primary-color);
    transition: width 0.3s;
}

/* ============================================
   Status Badges
   ============================================ */

.badge {
    display: inline-block;
    padding: 4px 12px;
    border-radius: 12px;
    font-size: 11px;
    font-weight: 600;
    text-transform: uppercase;
}

.badge-success {
    background-color: #d1fae5;
    color: #065f46;
}

.badge-pending {
    background-color: #fef3c7;
    color: #92400e;
}

.badge-processing {
    background-color: #dbeafe;
    color: #0c4a6e;
}

.badge-completed {
    background-color: #d1fae5;
    color: #065f46;
}

.badge-failed {
    background-color: #fee2e2;
    color: #991b1b;
}

/* ============================================
   Upload Area
   ============================================ */

.upload-area {
    border: 2px dashed var(--border-color);
    border-radius: 8px;
    padding: 40px;
    text-align: center;
    transition: all 0.3s;
    cursor: pointer;
}

.upload-area:hover {
    border-color: var(--primary-color);
    background-color: rgba(37, 99, 235, 0.05);
}

.upload-area.dragover {
    border-color: var(--primary-color);
    background-color: rgba(37, 99, 235, 0.1);
}

.upload-area-icon {
    font-size: 40px;
    margin-bottom: 16px;
}

.upload-area-text {
    color: var(--text-light);
    margin-bottom: 8px;
}

#csv_file {
    display: none;
}

/* ============================================
   Responsive Design
   ============================================ */

@media (max-width: 768px) {
    .container {
        padding: 0 12px;
    }

    .form-row {
        grid-template-columns: 1fr;
    }

    .stats-grid {
        grid-template-columns: 1fr;
    }

    .navbar-menu {
        gap: 15px;
    }

    .table-container {
        overflow-x: auto;
    }

    th, td {
        padding: 10px;
        font-size: 12px;
    }

    .btn {
        padding: 8px 12px;
        font-size: 12px;
    }

    .auth-card {
        padding: 30px 20px;
    }
}

@media (max-width: 480px) {
    h1 {
        font-size: 20px;
    }

    .btn-block {
        width: 100%;
    }

    .navbar-menu {
        flex-direction: column;
        gap: 10px;
    }

    .card {
        padding: 16px;
    }
}

/* ============================================
   Pagination
   ============================================ */

.pagination {
    display: flex;
    gap: 8px;
    justify-content: center;
    margin-top: 20px;
    padding: 20px 0;
    border-top: 1px solid var(--border-color);
    flex-wrap: wrap;
}

.pagination a,
.pagination button,
.pagination span {
    padding: 8px 12px;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    background-color: white;
    color: var(--primary-color);
    cursor: pointer;
    text-decoration: none;
    transition: all 0.2s;
    font-size: 0.875rem;
}

.pagination a:hover,
.pagination button:hover {
    background-color: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
}

.pagination .active {
    background-color: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
    cursor: default;
}

.pagination .disabled {
    color: var(--text-light);
    border-color: var(--border-color);
    cursor: not-allowed;
    opacity: 0.6;
}

.pagination-info {
    text-align: center;
    color: var(--text-light);
    font-size: 0.875rem;
    margin-top: 10px;
}
/* ============================================
   Loading Spinner Animation
   ============================================ */

.spinner-icon {
    display: inline-block;
    animation: spin 1s linear infinite;
    margin-right: 4px;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

button:disabled {
    cursor: not-allowed;
}